Nodules

Name:
Nodules
Detailed information:
Aggregates of ferromanganese occurring in huge quantities on the ocean floors. It has been estimated that they cover approximately 10% of the bottom of the Pacific. They are also present in other oceans and even in large lakes. The size averages approximately 4Cm, varying from small pellets to masses several meters in diameter. Their composition is approximately 55% manganese and 35% iron, the balance being cobalt, copper, and nickel. Their origin has not been definitely established. Proposals for commercial exploitation have been made, but no economically satisfactory method has been developed. Considerations of international law and ownership of the sea floor are also involved.